Spark plasma sintering of self-doped alumina powders. M. Suárez, A. Fernández, R. Torrecillas, J. L. Menéndez, S. García-Granda, F. Fauth. 2010.
International Journal of Materials Research 2010/01, Page 106-111, 2010. http://www.ijmr.de/web/o_archiv.asp?o_id=25112811648-50&ausgabe_id=2112992251-162&artikel_id=2112992253-9893&task=03&suchterm=&j=2010&h=01&nav_id=0
This work explores the sintering by spark plasma sintering of self-doped submicrometre alumina powders following an alcoxide route. It is shown that the self-doping process leads to nucleation of alumina nanoparticles located in the surface of the initial alumina grains, therefore avoiding the presence of phases other than α-Al2O3 in the final microstructure. The presence of such alumina nanocrystals leads to a modification of the sintering process minimizing grain growth compared to un-doped alumina powders under similar sintering conditions.